8d2cd130 |
1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
3 | * * |
4 | * Author: The ALICE Off-line Project. * |
5 | * Contributors are mentioned in the code where appropriate. * |
6 | * * |
7 | * Permission to use, copy, modify and distribute this software and its * |
8 | * documentation strictly for non-commercial purposes is hereby granted * |
9 | * without fee, provided that the above copyright notice appears in all * |
10 | * copies and that both the copyright notice and this permission notice * |
11 | * appear in the supporting documentation. The authors make no claims * |
12 | * about the suitability of this software for any purpose. It is * |
13 | * provided "as is" without express or implied warranty. * |
14 | **************************************************************************/ |
15 | |
7cdba479 |
16 | /* $Id$ */ |
8d2cd130 |
17 | |
18 | // |
19 | // Generator using the TPythia interface (via AliPythia) |
20 | // to generate pp collisions. |
21 | // Using SetNuclei() also nuclear modifications to the structure functions |
22 | // can be taken into account. This makes, of course, only sense for the |
23 | // generation of the products of hard processes (heavy flavor, jets ...) |
24 | // |
25 | // andreas.morsch@cern.ch |
26 | // |
27 | |
28 | #include <TDatabasePDG.h> |
29 | #include <TParticle.h> |
30 | #include <TPDGCode.h> |
31 | #include <TSystem.h> |
32 | #include <TTree.h> |
33 | |
34 | #include "AliConst.h" |
35 | #include "AliDecayerPythia.h" |
36 | #include "AliGenPythia.h" |
37 | #include "AliGenPythiaEventHeader.h" |
38 | #include "AliPythia.h" |
7cdba479 |
39 | #include "AliPythiaRndm.h" |
8d2cd130 |
40 | #include "AliRun.h" |
7ea3ea5b |
41 | #include "AliStack.h" |
42 | #include "AliRunLoader.h" |
5d12ce38 |
43 | #include "AliMC.h" |
8d2cd130 |
44 | |
014a9521 |
45 | ClassImp(AliGenPythia) |
8d2cd130 |
46 | |
47 | AliGenPythia::AliGenPythia() |
48 | :AliGenMC() |
49 | { |
50 | // Default Constructor |
51 | fParticles = 0; |
52 | fPythia = 0; |
e5c87a3d |
53 | fHeader = 0; |
8d2cd130 |
54 | fDecayer = new AliDecayerPythia(); |
55 | SetEventListRange(); |
56 | SetJetPhiRange(); |
57 | SetJetEtaRange(); |
58 | SetJetEtRange(); |
59 | SetGammaPhiRange(); |
60 | SetGammaEtaRange(); |
61 | SetPtKick(); |
7ea3ea5b |
62 | SetQuench(); |
63 | |
1d568bc2 |
64 | fSetNuclei = kFALSE; |
7cdba479 |
65 | if (!AliPythiaRndm::GetPythiaRandom()) |
66 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
8d2cd130 |
67 | } |
68 | |
69 | AliGenPythia::AliGenPythia(Int_t npart) |
70 | :AliGenMC(npart) |
71 | { |
72 | // default charm production at 5. 5 TeV |
73 | // semimuonic decay |
74 | // structure function GRVHO |
75 | // |
76 | fName = "Pythia"; |
77 | fTitle= "Particle Generator using PYTHIA"; |
78 | fXsection = 0.; |
8d2cd130 |
79 | SetProcess(); |
80 | SetStrucFunc(); |
81 | SetForceDecay(); |
82 | SetPtHard(); |
83 | SetYHard(); |
84 | SetEnergyCMS(); |
85 | fDecayer = new AliDecayerPythia(); |
86 | // Set random number generator |
7cdba479 |
87 | if (!AliPythiaRndm::GetPythiaRandom()) |
88 | AliPythiaRndm::SetPythiaRandom(GetRandom()); |
8d2cd130 |
89 | fFlavorSelect = 0; |
90 | // Produced particles |
91 | fParticles = new TClonesArray("TParticle",1000); |
e5c87a3d |
92 | fHeader = 0; |
8d2cd130 |
93 | SetEventListRange(); |
94 | SetJetPhiRange(); |
95 | SetJetEtaRange(); |
96 | SetJetEtRange(); |
97 | SetGammaPhiRange(); |
98 | SetGammaEtaRange(); |
99 | SetJetReconstructionMode(); |
7ea3ea5b |
100 | SetQuench(); |
8d2cd130 |
101 | SetPtKick(); |
102 | // Options determining what to keep in the stack (Heavy flavour generation) |
103 | fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor |
104 | fFeedDownOpt = kTRUE; // allow feed down from higher family |
105 | // Fragmentation on/off |
106 | fFragmentation = kTRUE; |
107 | // Default counting mode |
108 | fCountMode = kCountAll; |
592f8307 |
109 | // Pycel |
110 | SetPycellParameters(); |
1d568bc2 |
111 | fSetNuclei = kFALSE; |
8d2cd130 |
112 | } |
113 | |
114 | AliGenPythia::AliGenPythia(const AliGenPythia & Pythia) |
f936b8ea |
115 | :AliGenMC(Pythia) |
8d2cd130 |
116 | { |
117 | // copy constructor |
118 | Pythia.Copy(*this); |
119 | } |
120 | |
121 | AliGenPythia::~AliGenPythia() |
122 | { |
123 | // Destructor |
124 | } |
125 | |
592f8307 |
126 | void AliGenPythia::SetPycellParameters(Float_t etamax, Int_t neta, Int_t nphi, |
127 | Float_t thresh, Float_t etseed, Float_t minet, Float_t r) |
128 | { |
129 | // Set pycell parameters |
130 | fPycellEtaMax = etamax; |
131 | fPycellNEta = neta; |
132 | fPycellNPhi = nphi; |
133 | fPycellThreshold = thresh; |
134 | fPycellEtSeed = etseed; |
135 | fPycellMinEtJet = minet; |
136 | fPycellMaxRadius = r; |
137 | } |
138 | |
139 | |
140 | |
8d2cd130 |
141 | void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast) |
142 | { |
143 | // Set a range of event numbers, for which a table |
144 | // of generated particle will be printed |
145 | fDebugEventFirst = eventFirst; |
146 | fDebugEventLast = eventLast; |
147 | if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst; |
148 | } |
149 | |
150 | void AliGenPythia::Init() |
151 | { |
152 | // Initialisation |
153 | |
154 | SetMC(AliPythia::Instance()); |
b88f5cea |
155 | fPythia=(AliPythia*) fMCEvGen; |
e2bddf81 |
156 | |
8d2cd130 |
157 | // |
158 | fParentWeight=1./Float_t(fNpart); |
159 | // |
160 | // Forward Paramters to the AliPythia object |
161 | fDecayer->SetForceDecay(fForceDecay); |
162 | fDecayer->Init(); |
163 | |
164 | |
165 | fPythia->SetCKIN(3,fPtHardMin); |
166 | fPythia->SetCKIN(4,fPtHardMax); |
167 | fPythia->SetCKIN(7,fYHardMin); |
168 | fPythia->SetCKIN(8,fYHardMax); |
169 | |
1a626d4e |
170 | if (fAProjectile > 0 && fATarget > 0) fPythia->SetNuclei(fAProjectile, fATarget); |
8d2cd130 |
171 | // Fragmentation? |
172 | if (fFragmentation) { |
173 | fPythia->SetMSTP(111,1); |
174 | } else { |
175 | fPythia->SetMSTP(111,0); |
176 | } |
177 | |
178 | |
179 | // initial state radiation |
180 | fPythia->SetMSTP(61,fGinit); |
181 | // final state radiation |
182 | fPythia->SetMSTP(71,fGfinal); |
183 | // pt - kick |
184 | if (fPtKick > 0.) { |
185 | fPythia->SetMSTP(91,1); |
186 | fPythia->SetPARP(91,fPtKick); |
187 | } else { |
188 | fPythia->SetMSTP(91,0); |
189 | } |
190 | |
191 | // fPythia->SetMSTJ(1,2); |
192 | // |
193 | fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc); |
194 | |
195 | // Parent and Children Selection |
196 | switch (fProcess) |
197 | { |
198 | case kPyCharm: |
199 | case kPyCharmUnforced: |
adf4d898 |
200 | case kPyCharmPbPbMNR: |
aabc7187 |
201 | case kPyCharmppMNR: |
202 | case kPyCharmpPbMNR: |
8d2cd130 |
203 | fParentSelect[0] = 411; |
204 | fParentSelect[1] = 421; |
205 | fParentSelect[2] = 431; |
206 | fParentSelect[3] = 4122; |
207 | fFlavorSelect = 4; |
208 | break; |
adf4d898 |
209 | case kPyD0PbPbMNR: |
210 | case kPyD0pPbMNR: |
211 | case kPyD0ppMNR: |
8d2cd130 |
212 | fParentSelect[0] = 421; |
213 | fFlavorSelect = 4; |
214 | break; |
215 | case kPyBeauty: |
adf4d898 |
216 | case kPyBeautyPbPbMNR: |
217 | case kPyBeautypPbMNR: |
218 | case kPyBeautyppMNR: |
8d2cd130 |
219 | fParentSelect[0]= 511; |
220 | fParentSelect[1]= 521; |
221 | fParentSelect[2]= 531; |
222 | fParentSelect[3]= 5122; |
223 | fParentSelect[4]= 5132; |
224 | fParentSelect[5]= 5232; |
225 | fParentSelect[6]= 5332; |
226 | fFlavorSelect = 5; |
227 | break; |
228 | case kPyBeautyUnforced: |
229 | fParentSelect[0] = 511; |
230 | fParentSelect[1] = 521; |
231 | fParentSelect[2] = 531; |
232 | fParentSelect[3] = 5122; |
233 | fParentSelect[4] = 5132; |
234 | fParentSelect[5] = 5232; |
235 | fParentSelect[6] = 5332; |
236 | fFlavorSelect = 5; |
237 | break; |
238 | case kPyJpsiChi: |
239 | case kPyJpsi: |
240 | fParentSelect[0] = 443; |
241 | break; |
242 | case kPyMb: |
243 | case kPyMbNonDiffr: |
244 | case kPyJets: |
245 | case kPyDirectGamma: |
246 | break; |
247 | } |
248 | // |
592f8307 |
249 | // |
250 | // JetFinder for Trigger |
251 | // |
252 | // Configure detector (EMCAL like) |
253 | // |
254 | fPythia->SetPARU(51, fPycellEtaMax); |
255 | fPythia->SetMSTU(51, fPycellNEta); |
256 | fPythia->SetMSTU(52, fPycellNPhi); |
257 | // |
258 | // Configure Jet Finder |
259 | // |
260 | fPythia->SetPARU(58, fPycellThreshold); |
261 | fPythia->SetPARU(52, fPycellEtSeed); |
262 | fPythia->SetPARU(53, fPycellMinEtJet); |
263 | fPythia->SetPARU(54, fPycellMaxRadius); |
264 | fPythia->SetMSTU(54, 2); |
265 | // |
8d2cd130 |
266 | // This counts the total number of calls to Pyevnt() per run. |
267 | fTrialsRun = 0; |
268 | fQ = 0.; |
269 | fX1 = 0.; |
270 | fX2 = 0.; |
271 | fNev = 0 ; |
272 | // |
1d568bc2 |
273 | // |
274 | // |
8d2cd130 |
275 | AliGenMC::Init(); |
1d568bc2 |
276 | // |
277 | // |
278 | // |
279 | if (fSetNuclei) { |
280 | fDyBoost = 0; |
281 | Warning("Init","SetNuclei used. Use SetProjectile + SetTarget instead. fDyBoost has been reset to 0\n"); |
282 | } |
8d2cd130 |
283 | } |
284 | |
285 | void AliGenPythia::Generate() |
286 | { |
287 | // Generate one event |
e5c87a3d |
288 | |
8d2cd130 |
289 | fDecayer->ForceDecay(); |
290 | |
291 | Float_t polar[3] = {0,0,0}; |
292 | Float_t origin[3] = {0,0,0}; |
a920faf9 |
293 | Float_t p[4]; |
8d2cd130 |
294 | // converts from mm/c to s |
295 | const Float_t kconv=0.001/2.999792458e8; |
296 | // |
297 | Int_t nt=0; |
298 | Int_t jev=0; |
299 | Int_t j, kf; |
300 | fTrials=0; |
2590ccf9 |
301 | |
8d2cd130 |
302 | |
303 | // Set collision vertex position |
2590ccf9 |
304 | if (fVertexSmear == kPerEvent) Vertex(); |
305 | |
8d2cd130 |
306 | // event loop |
307 | while(1) |
308 | { |
7ea3ea5b |
309 | if (fQuench) { |
310 | fPythia->SetMSTJ(1, 0); |
311 | } |
8d2cd130 |
312 | fPythia->Pyevnt(); |
7ea3ea5b |
313 | |
314 | if (fQuench) { |
315 | fPythia->Quench(); |
316 | fPythia->SetMSTJ(1, 1); |
317 | fPythia->Pyexec(); |
318 | } |
319 | |
e2bddf81 |
320 | if (gAlice) { |
321 | if (gAlice->GetEvNumber()>=fDebugEventFirst && |
322 | gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(1); |
323 | } |
7ea3ea5b |
324 | |
8d2cd130 |
325 | fTrials++; |
8d2cd130 |
326 | fPythia->ImportParticles(fParticles,"All"); |
327 | |
1d568bc2 |
328 | Boost(); |
8d2cd130 |
329 | // |
330 | // |
331 | // |
332 | Int_t i; |
333 | |
334 | Int_t np = fParticles->GetEntriesFast(); |
335 | if (np == 0 ) continue; |
8d2cd130 |
336 | // |
2590ccf9 |
337 | |
8d2cd130 |
338 | // |
339 | Int_t* pParent = new Int_t[np]; |
340 | Int_t* pSelected = new Int_t[np]; |
341 | Int_t* trackIt = new Int_t[np]; |
342 | for (i=0; i< np; i++) { |
343 | pParent[i] = -1; |
344 | pSelected[i] = 0; |
345 | trackIt[i] = 0; |
346 | } |
347 | |
348 | Int_t nc = 0; // Total n. of selected particles |
349 | Int_t nParents = 0; // Selected parents |
350 | Int_t nTkbles = 0; // Trackable particles |
351 | if (fProcess != kPyMb && fProcess != kPyJets && |
352 | fProcess != kPyDirectGamma && |
353 | fProcess != kPyMbNonDiffr) { |
354 | |
355 | for (i = 0; i<np; i++) { |
2590ccf9 |
356 | TParticle* iparticle = (TParticle *) fParticles->At(i); |
8d2cd130 |
357 | Int_t ks = iparticle->GetStatusCode(); |
358 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
359 | // No initial state partons |
360 | if (ks==21) continue; |
361 | // |
362 | // Heavy Flavor Selection |
363 | // |
364 | // quark ? |
365 | kf = TMath::Abs(kf); |
366 | Int_t kfl = kf; |
367 | // meson ? |
368 | if (kfl > 10) kfl/=100; |
369 | // baryon |
370 | if (kfl > 10) kfl/=10; |
371 | if (kfl > 10) kfl/=10; |
372 | |
373 | Int_t ipa = iparticle->GetFirstMother()-1; |
374 | Int_t kfMo = 0; |
375 | |
376 | if (ipa > -1) { |
377 | TParticle * mother = (TParticle *) fParticles->At(ipa); |
378 | kfMo = TMath::Abs(mother->GetPdgCode()); |
379 | } |
380 | // What to keep in Stack? |
381 | Bool_t flavorOK = kFALSE; |
382 | Bool_t selectOK = kFALSE; |
383 | if (fFeedDownOpt) { |
384 | if (kfl >= fFlavorSelect) flavorOK = kTRUE; |
385 | } else { |
386 | if (kfl > fFlavorSelect) { |
387 | nc = -1; |
388 | break; |
389 | } |
390 | if (kfl == fFlavorSelect) flavorOK = kTRUE; |
391 | } |
392 | switch (fStackFillOpt) { |
393 | case kFlavorSelection: |
394 | selectOK = kTRUE; |
395 | break; |
396 | case kParentSelection: |
397 | if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE; |
398 | break; |
399 | } |
400 | if (flavorOK && selectOK) { |
401 | // |
402 | // Heavy flavor hadron or quark |
403 | // |
404 | // Kinematic seletion on final state heavy flavor mesons |
405 | if (ParentSelected(kf) && !KinematicSelection(iparticle, 0)) |
406 | { |
407 | continue; |
408 | } |
409 | pSelected[i] = 1; |
410 | if (ParentSelected(kf)) ++nParents; // Update parent count |
411 | // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf); |
412 | } else { |
413 | // Kinematic seletion on decay products |
414 | if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf) |
415 | && !KinematicSelection(iparticle, 1)) |
416 | { |
417 | continue; |
418 | } |
419 | // |
420 | // Decay products |
421 | // Select if mother was selected and is not tracked |
422 | |
423 | if (pSelected[ipa] && |
424 | !trackIt[ipa] && // mother will be tracked ? |
425 | kfMo != 5 && // mother is b-quark, don't store fragments |
426 | kfMo != 4 && // mother is c-quark, don't store fragments |
427 | kf != 92) // don't store string |
428 | { |
429 | // |
430 | // Semi-stable or de-selected: diselect decay products: |
431 | // |
432 | // |
433 | if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime) |
434 | { |
435 | Int_t ipF = iparticle->GetFirstDaughter(); |
436 | Int_t ipL = iparticle->GetLastDaughter(); |
437 | if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1; |
438 | } |
439 | // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf); |
440 | pSelected[i] = (pSelected[i] == -1) ? 0 : 1; |
441 | } |
442 | } |
443 | if (pSelected[i] == -1) pSelected[i] = 0; |
444 | if (!pSelected[i]) continue; |
445 | // Count quarks only if you did not include fragmentation |
446 | if (fFragmentation && kf <= 10) continue; |
447 | nc++; |
448 | // Decision on tracking |
449 | trackIt[i] = 0; |
450 | // |
451 | // Track final state particle |
452 | if (ks == 1) trackIt[i] = 1; |
453 | // Track semi-stable particles |
d25cfd65 |
454 | if ((ks == 1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1; |
8d2cd130 |
455 | // Track particles selected by process if undecayed. |
456 | if (fForceDecay == kNoDecay) { |
457 | if (ParentSelected(kf)) trackIt[i] = 1; |
458 | } else { |
459 | if (ParentSelected(kf)) trackIt[i] = 0; |
460 | } |
461 | if (trackIt[i] == 1) ++nTkbles; // Update trackable counter |
462 | // |
463 | // |
464 | |
465 | } // particle selection loop |
466 | if (nc > 0) { |
467 | for (i = 0; i<np; i++) { |
468 | if (!pSelected[i]) continue; |
469 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
470 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
471 | Int_t ks = iparticle->GetStatusCode(); |
472 | p[0] = iparticle->Px(); |
473 | p[1] = iparticle->Py(); |
474 | p[2] = iparticle->Pz(); |
a920faf9 |
475 | p[3] = iparticle->Energy(); |
476 | |
2590ccf9 |
477 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
478 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] |
479 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] |
480 | |
8d2cd130 |
481 | Float_t tof = kconv*iparticle->T(); |
482 | Int_t ipa = iparticle->GetFirstMother()-1; |
483 | Int_t iparent = (ipa > -1) ? pParent[ipa] : -1; |
a920faf9 |
484 | |
485 | PushTrack(fTrackIt*trackIt[i], iparent, kf, |
486 | p[0], p[1], p[2], p[3], |
487 | origin[0], origin[1], origin[2], tof, |
488 | polar[0], polar[1], polar[2], |
489 | kPPrimary, nt, 1., ks); |
8d2cd130 |
490 | pParent[i] = nt; |
491 | KeepTrack(nt); |
642f15cf |
492 | } // PushTrack loop |
8d2cd130 |
493 | } |
494 | } else { |
495 | nc = GenerateMB(); |
496 | } // mb ? |
497 | |
498 | if (pParent) delete[] pParent; |
499 | if (pSelected) delete[] pSelected; |
500 | if (trackIt) delete[] trackIt; |
501 | |
502 | if (nc > 0) { |
503 | switch (fCountMode) { |
504 | case kCountAll: |
505 | // printf(" Count all \n"); |
506 | jev += nc; |
507 | break; |
508 | case kCountParents: |
509 | // printf(" Count parents \n"); |
510 | jev += nParents; |
511 | break; |
512 | case kCountTrackables: |
513 | // printf(" Count trackable \n"); |
514 | jev += nTkbles; |
515 | break; |
516 | } |
517 | if (jev >= fNpart || fNpart == -1) { |
518 | fKineBias=Float_t(fNpart)/Float_t(fTrials); |
519 | printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev); |
520 | |
521 | fQ += fPythia->GetVINT(51); |
522 | fX1 += fPythia->GetVINT(41); |
523 | fX2 += fPythia->GetVINT(42); |
524 | fTrialsRun += fTrials; |
525 | fNev++; |
526 | MakeHeader(); |
527 | break; |
528 | } |
529 | } |
530 | } // event loop |
531 | SetHighWaterMark(nt); |
532 | // adjust weight due to kinematic selection |
b88f5cea |
533 | // AdjustWeights(); |
8d2cd130 |
534 | // get cross-section |
535 | fXsection=fPythia->GetPARI(1); |
536 | } |
537 | |
538 | Int_t AliGenPythia::GenerateMB() |
539 | { |
540 | // |
541 | // Min Bias selection and other global selections |
542 | // |
543 | Int_t i, kf, nt, iparent; |
544 | Int_t nc = 0; |
bf950da8 |
545 | Float_t p[4]; |
8d2cd130 |
546 | Float_t polar[3] = {0,0,0}; |
547 | Float_t origin[3] = {0,0,0}; |
548 | // converts from mm/c to s |
549 | const Float_t kconv=0.001/2.999792458e8; |
550 | |
551 | Int_t np = fParticles->GetEntriesFast(); |
552 | Int_t* pParent = new Int_t[np]; |
553 | for (i=0; i< np; i++) pParent[i] = -1; |
554 | if (fProcess == kPyJets || fProcess == kPyDirectGamma) { |
555 | TParticle* jet1 = (TParticle *) fParticles->At(6); |
556 | TParticle* jet2 = (TParticle *) fParticles->At(7); |
557 | if (!CheckTrigger(jet1, jet2)) return 0; |
558 | } |
559 | |
560 | for (i = 0; i<np; i++) { |
561 | Int_t trackIt = 0; |
562 | TParticle * iparticle = (TParticle *) fParticles->At(i); |
563 | kf = CheckPDGCode(iparticle->GetPdgCode()); |
564 | Int_t ks = iparticle->GetStatusCode(); |
565 | Int_t km = iparticle->GetFirstMother(); |
566 | if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) || |
567 | (ks != 1) || |
568 | (fProcess == kPyJets && ks == 21 && km == 0 && i>1)) { |
569 | nc++; |
570 | if (ks == 1) trackIt = 1; |
571 | Int_t ipa = iparticle->GetFirstMother()-1; |
572 | |
573 | iparent = (ipa > -1) ? pParent[ipa] : -1; |
574 | |
575 | // |
576 | // store track information |
577 | p[0] = iparticle->Px(); |
578 | p[1] = iparticle->Py(); |
579 | p[2] = iparticle->Pz(); |
a920faf9 |
580 | p[3] = iparticle->Energy(); |
581 | |
2590ccf9 |
582 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
583 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] |
584 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] |
585 | |
8d2cd130 |
586 | Float_t tof=kconv*iparticle->T(); |
a920faf9 |
587 | |
588 | PushTrack(fTrackIt*trackIt, iparent, kf, |
589 | p[0], p[1], p[2], p[3], |
590 | origin[0], origin[1], origin[2], tof, |
591 | polar[0], polar[1], polar[2], |
592 | kPPrimary, nt, 1., ks); |
8d2cd130 |
593 | KeepTrack(nt); |
594 | pParent[i] = nt; |
595 | } // select particle |
596 | } // particle loop |
597 | |
598 | if (pParent) delete[] pParent; |
599 | |
600 | printf("\n I've put %i particles on the stack \n",nc); |
601 | return nc; |
602 | } |
603 | |
604 | |
605 | void AliGenPythia::FinishRun() |
606 | { |
607 | // Print x-section summary |
608 | fPythia->Pystat(1); |
609 | fQ /= fNev; |
610 | fX1 /= fNev; |
611 | fX2 /= fNev; |
612 | printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun); |
613 | printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2); |
614 | |
615 | |
616 | } |
617 | |
618 | void AliGenPythia::AdjustWeights() |
619 | { |
620 | // Adjust the weights after generation of all events |
621 | // |
e2bddf81 |
622 | if (gAlice) { |
623 | TParticle *part; |
624 | Int_t ntrack=gAlice->GetMCApp()->GetNtrack(); |
625 | for (Int_t i=0; i<ntrack; i++) { |
626 | part= gAlice->GetMCApp()->Particle(i); |
627 | part->SetWeight(part->GetWeight()*fKineBias); |
628 | } |
8d2cd130 |
629 | } |
630 | } |
631 | |
632 | void AliGenPythia::SetNuclei(Int_t a1, Int_t a2) |
633 | { |
634 | // Treat protons as inside nuclei with mass numbers a1 and a2 |
1d568bc2 |
635 | |
1a626d4e |
636 | fAProjectile = a1; |
637 | fATarget = a2; |
1d568bc2 |
638 | fSetNuclei = kTRUE; |
8d2cd130 |
639 | } |
640 | |
641 | |
642 | void AliGenPythia::MakeHeader() |
643 | { |
644 | // Builds the event header, to be called after each event |
e5c87a3d |
645 | if (fHeader) delete fHeader; |
646 | fHeader = new AliGenPythiaEventHeader("Pythia"); |
8d2cd130 |
647 | // |
648 | // Event type |
e5c87a3d |
649 | ((AliGenPythiaEventHeader*) fHeader)->SetProcessType(fPythia->GetMSTI(1)); |
8d2cd130 |
650 | // |
651 | // Number of trials |
e5c87a3d |
652 | ((AliGenPythiaEventHeader*) fHeader)->SetTrials(fTrials); |
8d2cd130 |
653 | // |
654 | // Event Vertex |
d25cfd65 |
655 | fHeader->SetPrimaryVertex(fVertex); |
8d2cd130 |
656 | // |
657 | // Jets that have triggered |
658 | if (fProcess == kPyJets) |
659 | { |
660 | Int_t ntrig, njet; |
661 | Float_t jets[4][10]; |
662 | GetJets(njet, ntrig, jets); |
663 | |
664 | for (Int_t i = 0; i < ntrig; i++) { |
e5c87a3d |
665 | ((AliGenPythiaEventHeader*) fHeader)->AddJet(jets[0][i], jets[1][i], jets[2][i], |
8d2cd130 |
666 | jets[3][i]); |
667 | } |
668 | } |
e2bddf81 |
669 | if (gAlice) gAlice->SetGenEventHeader(fHeader); |
8d2cd130 |
670 | } |
671 | |
672 | |
673 | Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) |
674 | { |
675 | // Check the kinematic trigger condition |
676 | // |
677 | Double_t eta[2]; |
678 | eta[0] = jet1->Eta(); |
679 | eta[1] = jet2->Eta(); |
680 | Double_t phi[2]; |
681 | phi[0] = jet1->Phi(); |
682 | phi[1] = jet2->Phi(); |
683 | Int_t pdg[2]; |
684 | pdg[0] = jet1->GetPdgCode(); |
685 | pdg[1] = jet2->GetPdgCode(); |
686 | Bool_t triggered = kFALSE; |
687 | |
688 | if (fProcess == kPyJets) { |
689 | Int_t njets = 0; |
690 | Int_t ntrig = 0; |
691 | Float_t jets[4][10]; |
692 | // |
693 | // Use Pythia clustering on parton level to determine jet axis |
694 | // |
695 | GetJets(njets, ntrig, jets); |
696 | |
697 | if (ntrig) triggered = kTRUE; |
698 | // |
699 | } else { |
700 | Int_t ij = 0; |
701 | Int_t ig = 1; |
702 | if (pdg[0] == kGamma) { |
703 | ij = 1; |
704 | ig = 0; |
705 | } |
706 | //Check eta range first... |
707 | if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) && |
708 | (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma)) |
709 | { |
710 | //Eta is okay, now check phi range |
711 | if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) && |
712 | (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma)) |
713 | { |
714 | triggered = kTRUE; |
715 | } |
716 | } |
717 | } |
718 | return triggered; |
719 | } |
720 | |
721 | AliGenPythia& AliGenPythia::operator=(const AliGenPythia& rhs) |
722 | { |
723 | // Assignment operator |
014a9521 |
724 | rhs.Copy(*this); |
8d2cd130 |
725 | return *this; |
726 | } |
727 | |
728 | void AliGenPythia::LoadEvent() |
729 | { |
730 | // |
731 | // Load event into Pythia Common Block |
732 | // |
733 | |
7ea3ea5b |
734 | AliRunLoader* rl = AliRunLoader::GetRunLoader(); |
735 | Int_t npart = (rl->Stack())-> GetNprimary(); |
8d2cd130 |
736 | (fPythia->GetPyjets())->N = npart; |
737 | |
738 | for (Int_t part = 0; part < npart; part++) { |
7ea3ea5b |
739 | TParticle *MPart = (rl->Stack())->Particle(part); |
8d2cd130 |
740 | Int_t kf = MPart->GetPdgCode(); |
741 | Int_t ks = MPart->GetStatusCode(); |
742 | Float_t px = MPart->Px(); |
743 | Float_t py = MPart->Py(); |
744 | Float_t pz = MPart->Pz(); |
745 | Float_t e = MPart->Energy(); |
a920faf9 |
746 | Float_t m = MPart->GetCalcMass(); |
8d2cd130 |
747 | |
748 | |
749 | (fPythia->GetPyjets())->P[0][part] = px; |
750 | (fPythia->GetPyjets())->P[1][part] = py; |
751 | (fPythia->GetPyjets())->P[2][part] = pz; |
752 | (fPythia->GetPyjets())->P[3][part] = e; |
753 | (fPythia->GetPyjets())->P[4][part] = m; |
754 | |
755 | (fPythia->GetPyjets())->K[1][part] = kf; |
756 | (fPythia->GetPyjets())->K[0][part] = ks; |
757 | } |
758 | } |
759 | |
014a9521 |
760 | void AliGenPythia::RecJetsUA1(Int_t& njets, Float_t jets [4][50]) |
8d2cd130 |
761 | { |
762 | // |
763 | // Calls the Pythia jet finding algorithm to find jets in the current event |
764 | // |
765 | // |
8d2cd130 |
766 | // |
767 | // Save jets |
768 | Int_t n = fPythia->GetN(); |
769 | |
770 | // |
771 | // Run Jet Finder |
772 | fPythia->Pycell(njets); |
773 | Int_t i; |
774 | for (i = 0; i < njets; i++) { |
775 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
776 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
777 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
778 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
779 | |
780 | jets[0][i] = px; |
781 | jets[1][i] = py; |
782 | jets[2][i] = pz; |
783 | jets[3][i] = e; |
784 | } |
785 | } |
786 | |
787 | |
788 | |
789 | void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10]) |
790 | { |
791 | // |
792 | // Calls the Pythia clustering algorithm to find jets in the current event |
793 | // |
794 | Int_t n = fPythia->GetN(); |
795 | nJets = 0; |
796 | nJetsTrig = 0; |
797 | if (fJetReconstruction == kCluster) { |
798 | // |
799 | // Configure cluster algorithm |
800 | // |
801 | fPythia->SetPARU(43, 2.); |
802 | fPythia->SetMSTU(41, 1); |
803 | // |
804 | // Call cluster algorithm |
805 | // |
806 | fPythia->Pyclus(nJets); |
807 | // |
808 | // Loading jets from common block |
809 | // |
810 | } else { |
592f8307 |
811 | |
8d2cd130 |
812 | // |
813 | // Run Jet Finder |
814 | fPythia->Pycell(nJets); |
815 | } |
816 | |
817 | Int_t i; |
818 | for (i = 0; i < nJets; i++) { |
819 | Float_t px = (fPythia->GetPyjets())->P[0][n+i]; |
820 | Float_t py = (fPythia->GetPyjets())->P[1][n+i]; |
821 | Float_t pz = (fPythia->GetPyjets())->P[2][n+i]; |
822 | Float_t e = (fPythia->GetPyjets())->P[3][n+i]; |
823 | Float_t pt = TMath::Sqrt(px * px + py * py); |
a920faf9 |
824 | Float_t phi = TMath::Pi() + TMath::ATan2(-py, -px); |
8d2cd130 |
825 | Float_t theta = TMath::ATan2(pt,pz); |
826 | Float_t et = e * TMath::Sin(theta); |
827 | Float_t eta = -TMath::Log(TMath::Tan(theta / 2.)); |
828 | |
829 | if ( |
830 | eta > fEtaMinJet && eta < fEtaMaxJet && |
675eb105 |
831 | phi > fPhiMinJet && phi < fPhiMaxJet && |
8d2cd130 |
832 | et > fEtMinJet && et < fEtMaxJet |
833 | ) |
834 | { |
835 | jets[0][nJetsTrig] = px; |
836 | jets[1][nJetsTrig] = py; |
837 | jets[2][nJetsTrig] = pz; |
838 | jets[3][nJetsTrig] = e; |
839 | nJetsTrig++; |
840 | |
841 | } else { |
842 | // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg); |
843 | } |
844 | } |
845 | } |
846 | |
847 | |
848 | #ifdef never |
849 | void AliGenPythia::Streamer(TBuffer &R__b) |
850 | { |
851 | // Stream an object of class AliGenPythia. |
852 | |
853 | if (R__b.IsReading()) { |
854 | Version_t R__v = R__b.ReadVersion(); if (R__v) { } |
855 | AliGenerator::Streamer(R__b); |
856 | R__b >> (Int_t&)fProcess; |
857 | R__b >> (Int_t&)fStrucFunc; |
858 | R__b >> (Int_t&)fForceDecay; |
859 | R__b >> fEnergyCMS; |
860 | R__b >> fKineBias; |
861 | R__b >> fTrials; |
862 | fParentSelect.Streamer(R__b); |
863 | fChildSelect.Streamer(R__b); |
864 | R__b >> fXsection; |
865 | // (AliPythia::Instance())->Streamer(R__b); |
866 | R__b >> fPtHardMin; |
867 | R__b >> fPtHardMax; |
868 | // if (fDecayer) fDecayer->Streamer(R__b); |
869 | } else { |
870 | R__b.WriteVersion(AliGenPythia::IsA()); |
871 | AliGenerator::Streamer(R__b); |
872 | R__b << (Int_t)fProcess; |
873 | R__b << (Int_t)fStrucFunc; |
874 | R__b << (Int_t)fForceDecay; |
875 | R__b << fEnergyCMS; |
876 | R__b << fKineBias; |
877 | R__b << fTrials; |
878 | fParentSelect.Streamer(R__b); |
879 | fChildSelect.Streamer(R__b); |
880 | R__b << fXsection; |
881 | // R__b << fPythia; |
882 | R__b << fPtHardMin; |
883 | R__b << fPtHardMax; |
884 | // fDecayer->Streamer(R__b); |
885 | } |
886 | } |
887 | #endif |
888 | |